CN112749499A - Simulation method and device for quickly diagnosing NVH performance of motor structure - Google Patents
Simulation method and device for quickly diagnosing NVH performance of motor structure Download PDFInfo
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Abstract
The invention discloses a simulation method and a simulation device for quickly diagnosing NVH performance of a motor structure, wherein the method comprises the following steps: setting the structural common excitation distribution of the motor, and creating the working condition of the order force excitation key point; establishing a loading coordinate system and applying unit force excitation; establishing a dynamic excitation loading curve and a dynamic load; establishing a frequency response analysis sweep frequency card and a damping loading curve; establishing a modal analysis card and a frequency response analysis set; establishing an output card, and calculating and displaying a vibration frequency response curve graph; and analyzing the simulation result by taking the vibration response curve of the preset product in the preset loading mode as a reference. Compared with the prior art, the motor structure NVH performance simulation efficiency and reliability are greatly improved.
Description
Technical Field
The invention relates to the technical field of motor structures, in particular to a simulation method and a simulation device for quickly diagnosing NVH (noise, vibration and harshness) performance of a motor structure.
Background
One of the currently common motor structure NVH (Noise, Vibration, Harshness) optimization techniques is modal simulation and modal testing. The mode is the natural vibration characteristic of the structure and consists of natural frequency, damping ratio and mode shape. The modal frequency and the mode shape of the structure can be rapidly obtained through modal simulation, and more accurate physical parameters such as the modal frequency, modal damping, modal mode shape, modal rigidity and the like can be obtained through modal test analysis, so that possible vibration response of the structure under the excitation action can be predicted. However, the existing NVH test has the following defects: firstly, in the modal test, the defects of high test cost, inconvenient excitation application and long test period exist; secondly, in the method for performing modal simulation by using the finite element, the defect of undefined simulation optimization direction exists; and thirdly, the simulation of the electromagnetic and structural coupling vibration noise has the defects of high multidisciplinary simulation cost and cross-professional field, simulation personnel are required to have electromagnetic and structural professional knowledge and simulation optimization capability at the same time, and mechanical engineers generally lack electromagnetic theoretical knowledge and electromagnetic simulation capability. Therefore, how to improve the simulation efficiency and reliability of the NVH performance of the motor structure is very important.
Disclosure of Invention
The invention mainly aims to provide a simulation method for quickly diagnosing NVH performance of a motor structure, and aims to solve the technical problems of improving the simulation efficiency and reliability of the NVH performance of the motor structure.
The invention provides a simulation method for quickly diagnosing NVH performance of a motor structure, which comprises the following steps:
setting motor structure key excitation distribution, and creating order force excitation finite element key point working conditions;
establishing a loading coordinate system and applying unit force excitation;
establishing a dynamic excitation loading curve and a dynamic load;
establishing a frequency response analysis sweep frequency card and a damping loading curve;
establishing a modal analysis card and a frequency response analysis set;
establishing an output card, and calculating and displaying a vibration frequency response curve graph;
and analyzing the simulation result by taking the vibration response curve of the preset product in the preset loading mode as a reference.
Preferably, the step of setting motor structure excitation distribution and creating order force excitation key point working condition includes:
and selecting important electromagnetic force waves as excitation according to the excitation characteristics of the motor, sequentially selecting key points on finite element grid nodes of the motor, and establishing each-order force condition card.
Preferably, the step of establishing a loading coordinate system and applying a single force stimulus comprises:
establishing a local coordinate system for loading excitation in systems according to the excitation mode and action direction of electromagnetic force on the motor structure;
and applying unit force resultant excitation to each force wave under constraints, and performing sensitivity corresponding analysis, wherein the systems and the constraints are functional modules of simulation software.
Preferably, the step of establishing a dynamic excitation loading curve and a dynamic load comprises:
acquiring a value of excitation frequency of the motor at the highest rotating speed, thereby determining an analysis frequency range and creating an excitation magnitude loading curve;
and establishing a dynamic load card in the load collectors, and generating an excitation loading curve which changes along with the frequency, wherein the load collectors are functional modules of the simulation software.
Preferably, the step of establishing the frequency response analysis sweep card and the damping loading curve includes:
establishing a sweep frequency card in load collectors, and defining the frequency range of vibration analysis and the increment step size of analysis frequency;
and establishing a loading curve, and applying a damping ratio which changes along with the frequency to the motor structure.
Preferably, the step of establishing a modal analysis card and a frequency response analysis set includes:
establishing a modal analysis card of a motor structure under load collectors, and designating an analysis frequency range;
a vibration analysis card is established under load steps, and dynamic load excitation information, damping information, modal information and sweep frequency range information of the motor are integrated, wherein the load steps are functional modules of simulation software.
Preferably, the step of establishing an output card, calculating and displaying a vibration frequency response curve chart comprises:
and setting simulation output vibration acceleration information, speed information and displacement amplitude information under a control card, wherein the control card is a functional module of simulation software.
Preferably, the step of analyzing the simulation result with a vibration response curve of the preset product in the preset loading mode as a reference includes:
and comparing the first simulation result with a second simulation result of the motor structure through the motor and structure coupling NVH simulation to obtain correlation analysis of the first simulation result and the second simulation result, wherein the first simulation result is the simulation result generated by the method, and the contents of the first simulation result and the second simulation result both comprise vibration information and noise frequency information of the motor structure.
Preferably, after the step of analyzing the simulation result with the vibration response curve of the preset product in the preset loading mode as a reference, the method includes:
and if the simulation result is qualified, merging the data corresponding to the simulation result into a motor structure response database.
The invention also provides a simulation device for quickly diagnosing the NVH performance of the motor structure, which comprises the following components:
the setting module is used for setting the key excitation distribution of the motor structure and creating the working condition of key points of the order force excitation finite element;
the first establishing module is used for establishing a loading coordinate system and applying unit force excitation to each working condition;
the second establishing module is used for establishing a dynamic excitation loading curve and a dynamic load;
the third establishing module is used for establishing a frequency response analysis sweep frequency card and a damping loading curve;
the fourth establishing module is used for establishing a modal analysis card and a frequency response analysis set;
the calculation module is used for establishing an output card, calculating and displaying a vibration frequency response curve graph;
and the analysis module is used for analyzing the simulation result by taking the vibration response curve of the preset product in the preset loading mode as a reference.
The invention has the beneficial effects that: the method is a finite element simulation method, the electromagnetic force and the structural modal characteristic of the motor are considered, the excitation applying method is optimized, and only structural vibration simulation is needed, so that the noise characteristic is estimated according to the vibration result. The simulation result of the method can obtain the structure uniqueness, the speed response and the acceleration response, and the NVH performance of the structure can be evaluated and predicted according to the amplitude. Therefore, the application has the following advantages: firstly, the simulation threshold is low, high efficiency (can shorten the simulation time of a plurality of weeks), no electromagnetism and noise simulation software is needed, the simulation cost is low, and no electromagnetism simulation is needed (the excitation is applied as the common excitation, the characteristics and the action form of the excitation are solidified through the electromagnetism theory and the electromagnetism simulation in the early stage), the mechanical engineer can finish the simulation independently. Secondly, the excitation applying mode is more flexible, the excitation action refers to the electromagnetic and structure combined simulation result-the electromagnetic force distribution on the structure, the excitation applying is integrated based on a modal test method, and the excitation distribution and the action form are optimized by combining the excitation applying mode and the structure combined simulation result; the excitation of the rotor can be simulated; various excitation conditions (operation conditions) can be flexibly defined. And thirdly, guiding structure optimization design, wherein the structural vibration amplitude is obtained based on structural mode and excited vibration simulation, and the structural vibration amplitude can be used for evaluating the NVH performance of the structure or formulating a design rule. The method belongs to a forward research method, and research and development quality and efficiency are improved; the modal test is based on a test analysis optimization technology of a sample, is a reverse optimization technology, belongs to simulation analysis based on a digital-analog, and can evaluate the NVH performance of a structure according to a simulation result, guide the structure optimization design in an early stage, improve the quality and reliability of the sample and improve the research and development quality.
Drawings
Fig. 1 is a schematic flowchart of a simulation method for rapidly diagnosing NVH performance of a motor structure according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a simulation apparatus for rapidly diagnosing NVH performance of a motor structure according to a first embodiment of the present invention;
FIG. 3 is a schematic view of an acceleration frequency response curve in the embodiment of FIG. 1;
fig. 4 is a diagram illustrating a simulation result of the noise in the embodiment of fig. 1.
Description of reference numerals:
1. setting a module; 2. a first establishing module; 3. a second establishing module; 4. a third establishing module; 5. a fourth establishing module; 6. a calculation module; 7. and an analysis module.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the invention provides a simulation method for quickly diagnosing NVH performance of a motor structure, which includes:
s1: setting the key excitation distribution of the motor structure, and creating the working condition of key points of finite element excitation by order force.
In the embodiment of the invention, the NVH performance of the motor structure needs to be simulated by simulation software named hyper works. The motor excitation source is based on the primary order electromagnetic spatial force waves and mechanical orders. For the motor matched with each designated tooth slot, the shape and the frequency of a main force wave are fixed (obtained by a motor electromagnetic theory analytical method or electromagnetic finite element simulation), all the force waves are also distributed on a stator and a rotor of the motor in a specific space, and important electromagnetic force waves (such as force waves with low modulus and high assignment) are selected as excitation according to the excitation characteristics of the motor. The distribution form of excitation is simplified and equivalent according to an electromagnetic simulation result, the working condition of key points depends on the order of main force waves of the motor, the selection of the key points is based on a method for selecting the excitation points in a modal test, the key points are sequentially selected on the nodes of a finite element grid of the motor (obtained by approximate simplification according to the amplitude distribution of electromagnetic force waves on motor teeth), and a card of the working condition of each order is established.
S2: and establishing a loading coordinate system, and applying unit force excitation.
In the embodiment of the invention, a local coordinate system for loading excitation is established in systems according to the excitation mode and the action direction of electromagnetic force on the motor structure. Due to the fact that the excitation sizes of different motors are different, the universality and the high efficiency of the method are considered, the unit force resultant excitation is applied to each force wave under constraints, sensitivity response analysis is conducted, and design specifications are formed conveniently. Wherein, systems and constraints are functional modules of hyper works software
S3: and establishing a dynamic excitation loading curve and a dynamic load.
In the embodiment of the present invention, the frequency of the force wave is generally different for each excitation force wave of the motor, and for a certain force wave order, it is also possible to consist of several frequencies, and the frequency of the force wave is also changed at different rotation speeds. And determining an analysis frequency range according to the excitation frequency at the highest rotating speed of the motor, and creating an excitation magnitude loading curve. A dynamic load card is established in load collectors, unit force excitation is applied in a gathering mode, and an excitation loading curve changing along with frequency is generated by establishing a dynamic excitation loading curve. Wherein, the load clusters are functional modules of hyper works software.
S4: and establishing a frequency response analysis sweep frequency card and a damping loading curve.
In the embodiment of the invention, a scanning card is established in the load collectors, and the frequency range of vibration analysis and the increment step size of the analysis frequency are defined. And (4) considering the damping of the structure, establishing a damping loading curve, and applying a damping ratio which changes along with the frequency to the motor structure.
S5: and establishing a modal analysis card and a frequency response analysis set.
In the embodiment of the invention, the vibration response of the simulation method is based on the structural modal frequency and the vibration mode, a motor structural modal analysis card is established under load collectors, and an analysis frequency range is formulated. And then establishing a vibration analysis card under load steps, and integrating motor dynamic load excitation information, damping information, modal information and sweep frequency range information, wherein the load steps are functional modules of hyper works software.
S6: and establishing an output card, and calculating and displaying a vibration frequency response curve graph.
In the embodiment of the invention, referring to fig. 3, the simulated output vibration acceleration, speed and displacement amplitude are set under the control cards, and a vibration frequency response curve graph is displayed after calculation is completed, wherein the control cards are functional modules of hyperbworks software.
S7: and analyzing the simulation result by taking the vibration response curve of the preset product in the preset loading mode as a reference.
In the embodiment of the invention, referring to fig. 4, a first simulation result is compared with a second simulation result of NVH simulation in which a motor structure is coupled with a structure through a motor, so as to obtain a correlation analysis between the first simulation result and the second simulation result, wherein the first simulation result is a simulation result generated by the method, and the contents of the first simulation result and the second simulation result both include vibration information and noise frequency information of the motor structure. And comparing the first simulation result of the application with a second simulation result of NVH simulation by coupling the motor mechanism with the structure through the motor, so as to obtain analysis of the simulation result of the application. Specifically, the vibration evaluation is based on a vibration response curve generated by a method for simulating motor-structure coupling NVH (vibration-harshness) on a standard product (namely the same motor mechanism). The feasibility and the precision of the simulation result of the application are better consistent with the vibration and noise frequency of the electromagnetic and structural coupling NVH simulation in response frequency by comparing the results of the electromagnetic and structural coupling NVH simulation.
Further, after step S7 of analyzing the simulation result based on the vibration response curve of the preset product in the preset loading mode, the method includes:
s8: and if the simulation result is qualified, merging the data corresponding to the simulation result into a motor structure response database.
In the embodiment of the invention, if the simulation result is qualified, the data corresponding to the simulation result is merged into the motor structure response database. A motor structure response database is established based on the method, a structure NVH performance evaluation criterion is formed, and new product development and optimization design are guided. The response process of the motor structure of the simulation method comprises the steps of separating the electromagnetic force borne by the motor, only applying the key electromagnetic force, and simplifying the application mode, so that the effect of quickly and guiding the design is achieved.
In conclusion, the method is a finite element simulation method, the electromagnetic force and the structural modal characteristic of the motor are considered, the excitation applying method is optimized, and only structural vibration simulation is needed, so that the noise characteristic is estimated according to the vibration result. The simulation result of the method can obtain the structure uniqueness, the speed response and the acceleration response, and the NVH performance of the structure can be evaluated and predicted according to the amplitude. Therefore, the application has the following advantages: firstly, the emulation threshold is low, and is efficient, does not need electromagnetism and noise simulation software, and the emulation is with low costs, and need not electromagnetism emulation (applys common electromagnetic excitation), and mechanical engineer can independently accomplish, and the simulation time is also short. Secondly, the excitation applying mode is more flexible, the excitation source and the characteristics refer to the electromagnetic and structure combined simulation result, namely the electromagnetic force distribution on the structure, the excitation applying set modal test method is integrated, and the excitation distribution and the action form are optimized by combining the excitation source and the characteristics; the excitation of the electromagnetic force of the rotor can be simulated; and various excitation working conditions can be flexibly defined (various operation working conditions can be simulated). And thirdly, guiding structure optimization design, wherein the structural vibration amplitude is obtained based on structural mode and excited vibration simulation, and the structural vibration amplitude can be used for evaluating the NVH performance of the structure or formulating a design rule. The method belongs to a forward research method, and research and development quality and efficiency are improved; the modal test is based on a test analysis optimization technology of a sample, is a reverse optimization technology, belongs to simulation analysis based on a digital-analog, and can evaluate the NVH performance of a structure according to a simulation result, guide the structure optimization design in the early stage of product manufacture, improve the quality and reliability of the sample and improve the research and development quality.
Referring to fig. 2, the present invention provides a simulation apparatus for rapidly diagnosing NVH performance of a motor structure, including:
the setting module 1 sets the key excitation distribution of the motor structure and creates the working condition of key points of the order force excitation finite element.
In the embodiment of the invention, the NVH performance of the motor structure needs to be simulated by simulation software named hyper works. The motor excitation source is based on the primary order electromagnetic spatial force waves and mechanical orders. For the motor matched with each designated tooth slot, the shape and the frequency of a main force wave are fixed (obtained by a motor electromagnetic theory analytical method or electromagnetic finite element simulation), all the force waves are also distributed on a stator and a rotor of the motor in a specific space, and important electromagnetic force waves (such as force waves with low modulus and high assignment) are selected as excitation according to the excitation characteristics of the motor. The working condition of the key points depends on the main force wave order of the motor, the selection of the key points is based on a method for selecting excitation points in a modal test, the key points are sequentially selected on the nodes of a finite element grid of the motor (obtained by approximately simplifying the amplitude distribution of electromagnetic force waves on motor teeth), and a force working condition card of each order is established.
The first establishing module 2 is used for establishing a loading coordinate system and applying unit force excitation.
In the embodiment of the invention, a local coordinate system for loading excitation is established in systems according to the excitation mode and the action direction of electromagnetic force on the motor structure. Due to the fact that the excitation sizes of different motors are different, the universality and the high efficiency of the method are considered, the unit force resultant excitation is applied to each force wave under constraints, sensitivity response analysis is conducted, and design specifications are formed conveniently. Wherein, systems and constraints are functional modules of hyper works software
And the second establishing module 3 is used for establishing a dynamic excitation loading curve and a dynamic load.
In the embodiment of the present invention, the frequency of the force wave is generally different for each excitation force wave of the motor, and for a certain force wave order, it is also possible to consist of several frequencies, and the frequency of the force wave is also changed at different rotation speeds. And determining an analysis frequency range according to the excitation frequency at the highest rotating speed of the motor, and creating an excitation magnitude loading curve. A dynamic load card is established in load collectors, unit force excitation is applied in a gathering mode, and an excitation loading curve changing along with frequency is generated by establishing a dynamic excitation loading curve. Wherein, the load clusters are functional modules of hyper works software.
And the third establishing module 4 is used for establishing a frequency response analysis sweep frequency card and a damping loading curve.
In the embodiment of the invention, a scanning card is established in the load collectors, and the frequency range of vibration analysis and the increment step size of the analysis frequency are defined. And (4) considering the damping of the structure, establishing a damping loading curve, and applying a damping ratio which changes along with the frequency to the motor structure.
And the fourth establishing module 5 is used for establishing a modal analysis card and a frequency response analysis set.
In the embodiment of the invention, the vibration response of the simulation method is based on the structural modal frequency and the vibration mode, a motor structural modal analysis card is established under load collectors, and an analysis frequency range is formulated. And then establishing a vibration analysis card under load steps, and integrating motor dynamic load excitation information, damping information, modal information and sweep frequency range information, wherein the load steps are functional modules of hyper works software.
And the calculation module 6 is used for establishing an output card, and calculating and displaying a vibration frequency response curve graph.
In the embodiment of the invention, referring to fig. 3, the simulated output vibration acceleration, speed and displacement amplitude are set under the control cards, and a vibration frequency response curve graph is displayed after calculation is completed, wherein the control cards are functional modules of hyperbworks software.
And the analysis module 7 is used for analyzing the simulation result by taking the vibration response curve of the preset product in the preset loading mode as a reference.
In the embodiment of the invention, referring to fig. 4, a first simulation result is compared with a second simulation result of NVH simulation in which a motor structure is coupled with a structure through a motor, so as to obtain a correlation analysis between the first simulation result and the second simulation result, wherein the first simulation result is a simulation result generated by the method, and the contents of the first simulation result and the second simulation result both include vibration information and noise frequency information of the motor structure. And comparing the first simulation result of the application with a second simulation result of NVH simulation by coupling the motor mechanism with the structure through the motor, so as to obtain analysis of the simulation result of the application. Specifically, the vibration evaluation is based on a vibration response curve generated by a method for simulating motor-structure coupling NVH (vibration-harshness) on a standard product (namely the same motor mechanism). The feasibility and the precision of the simulation result of the application are better consistent with the vibration and noise frequency of the electromagnetic and structural coupling NVH simulation in response frequency by comparing the results of the electromagnetic and structural coupling NVH simulation.
Further, a simulation apparatus for rapidly diagnosing NVH performance of a motor structure further includes:
and the database setting module is used for merging the data corresponding to the simulation result into the motor structure response database if the simulation result is qualified in analysis.
In the embodiment of the invention, if the simulation result is qualified, the data corresponding to the simulation result is merged into the motor structure response database. A motor structure response database is established based on the method, a structure NVH performance evaluation criterion is formed, and new product development and optimization design are guided. The response process of the motor structure of the simulation method comprises the steps of separating the electromagnetic force borne by the motor, only applying the key electromagnetic force, and simplifying the application mode, so that the effect of quickly and guiding the design is achieved.
In conclusion, the method is a finite element simulation method, the electromagnetic force and the structural modal characteristic of the motor are considered, the excitation applying method is optimized, and only structural vibration simulation is needed, so that the noise characteristic is estimated according to the vibration result. The simulation result of the method can obtain the structure uniqueness, the speed response and the acceleration response, and the NVH performance of the structure can be evaluated and predicted according to the amplitude. Therefore, the application has the following advantages: firstly, the emulation threshold is low, and is efficient, does not need electromagnetism and noise simulation software, and the emulation is with low costs, and need not electromagnetism emulation (applys common electromagnetic excitation), and mechanical engineer can independently accomplish, and the simulation time is also short. Secondly, the excitation applying mode is more flexible, the excitation source and the characteristics refer to the electromagnetic and structure combined simulation result, namely the electromagnetic force distribution on the structure, the excitation applying set modal test method is integrated, and the excitation distribution and the action form are optimized by combining the excitation source and the characteristics; the excitation of the electromagnetic force of the rotor can be simulated; and various excitation working conditions can be flexibly defined (various operation working conditions can be simulated). And thirdly, guiding structure optimization design, wherein the structural vibration amplitude is obtained based on structural mode and excited vibration simulation, and the structural vibration amplitude can be used for evaluating the NVH performance of the structure or formulating a design rule. The method belongs to a forward research method, and research and development quality and efficiency are improved; the modal test is based on a test analysis optimization technology of a sample, is a reverse optimization technology, belongs to simulation analysis based on a digital-analog, and can evaluate the NVH performance of a structure according to a simulation result, guide the structure optimization design in the early stage of product manufacture, improve the quality and reliability of the sample and improve the research and development quality.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A simulation method for quickly diagnosing NVH performance of a motor structure is characterized by comprising the following steps:
setting motor structure key excitation distribution, and creating order force excitation finite element key point working conditions;
establishing a loading coordinate system and applying unit force excitation;
establishing a dynamic excitation loading curve and a dynamic load;
establishing a frequency response analysis sweep frequency card and a damping loading curve;
establishing a modal analysis card and a frequency response analysis set;
establishing an output card, and calculating and displaying a vibration frequency response curve graph;
and analyzing the simulation result by taking the vibration response curve of the preset product in the preset loading mode as a reference.
2. The simulation method for rapidly diagnosing the NVH performance of the motor structure according to claim 1, wherein the step of setting the excitation distribution of the motor structure and creating the working conditions of the order force excitation key points comprises the following steps:
and selecting important electromagnetic force waves as excitation according to the excitation characteristics of the motor, sequentially selecting key points on finite element grid nodes of the motor, and establishing each-order force condition card.
3. The simulation method for rapidly diagnosing the NVH performance of a motor structure according to claim 2, wherein the step of establishing a loading coordinate system and applying a unit force excitation comprises the steps of:
establishing a local coordinate system for loading excitation in systems according to the excitation mode and action direction of electromagnetic force on the motor structure;
and applying unit force resultant excitation to each force wave under constraints, and performing sensitivity corresponding analysis, wherein the systems and the constraints are functional modules of simulation software.
4. The simulation method for rapidly diagnosing the NVH performance of the motor structure according to claim 3, wherein the step of establishing the dynamic excitation loading curve and the dynamic load comprises the following steps:
acquiring a value of excitation frequency of the motor at the highest rotating speed, thereby determining an analysis frequency range and creating an excitation magnitude loading curve;
establishing a dynamic load card in load collectors, and generating an excitation loading curve changing along with frequency, wherein the load collectors are functional modules of simulation software.
5. The simulation method for rapidly diagnosing the NVH performance of the motor structure according to claim 4, wherein the step of establishing a frequency response analysis sweep card and a damping loading curve comprises the following steps:
establishing a sweep frequency card in the load clusters, and defining the frequency range of vibration analysis and the increment step size of analysis frequency;
and establishing a loading curve, and applying a damping ratio which changes along with the frequency to the motor structure.
6. The simulation method for rapidly diagnosing the NVH performance of the motor structure according to claim 5, wherein the step of establishing a modal analysis card and a frequency response analysis set comprises the following steps:
establishing a modal analysis card of the motor structure under the load collectors, and designating an analysis frequency range;
a vibration analysis card is established under load steps, and dynamic load excitation information, damping information, modal information and sweep frequency range information of a motor are integrated, wherein the load steps are functional modules of simulation software.
7. The simulation method for rapidly diagnosing the NVH performance of the motor structure according to claim 6, wherein the steps of establishing an output card, calculating and displaying a vibration frequency response curve chart comprise the following steps:
and setting simulation output vibration acceleration information, speed information and displacement amplitude information under a control cards, wherein the control cards are functional modules of simulation software.
8. The simulation method for rapidly diagnosing the NVH performance of the motor structure according to claim 7, wherein the step of analyzing the simulation result with the vibration response curve of the preset product in the preset loading mode as a reference comprises the following steps:
and comparing a first simulation result with a second simulation result of the motor structure through motor and structure coupling NVH simulation to obtain correlation analysis of the first simulation result and the second simulation result, wherein the first simulation result is a simulation result generated by the method, and the contents of the first simulation result and the second simulation result both comprise vibration information and noise frequency information of the motor structure.
9. The simulation method for rapidly diagnosing the NVH performance of the motor structure according to claim 8, wherein the step of analyzing the simulation result based on the vibration response curve of the preset product in the preset loading mode comprises the following steps:
and if the simulation result is analyzed to be qualified, merging the data corresponding to the simulation result into a motor structure response database.
10. A simulation device for rapidly diagnosing NVH performance of a motor structure is characterized by comprising:
the setting module is used for setting the key excitation distribution of the motor structure and creating the working condition of key points of the order force excitation finite element;
the first establishing module is used for establishing a loading coordinate system and applying unit force excitation to each working condition;
the second establishing module is used for establishing a dynamic excitation loading curve and a dynamic load;
the third establishing module is used for establishing a frequency response analysis sweep frequency card and a damping loading curve;
the fourth establishing module is used for establishing a modal analysis card and a frequency response analysis set;
the calculation module is used for establishing an output card, calculating and displaying a vibration frequency response curve graph;
and the analysis module is used for analyzing the simulation result by taking the vibration response curve of the preset product in the preset loading mode as a reference.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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